Overview
The AD7303BRM is a dual, 8-bit voltage output digital-to-analog converter (DAC) manufactured by Analog Devices Inc. This component operates from a single supply voltage ranging from +2.7 V to +5.5 V, making it suitable for a variety of applications, including portable battery-powered instruments, digital gain and offset adjustment, programmable voltage and current sources, and programmable attenuators. The AD7303BRM features a high-speed serial interface compatible with SPI, QSPI, and Microwire standards, allowing for easy integration with digital signal processors and microcontrollers.
Key Specifications
| Parameter | Value | Units | Conditions/Comments |
|---|---|---|---|
| Resolution | 8-bit | ||
| Number of DAC Channels | 2 | ||
| Minimum Single Supply Voltage | 2.7 | V | |
| Maximum Single Supply Voltage | 5.5 | V | |
| Maximum Settling Time | 2 | μs | |
| Digital Interface Type | Serial (3-Wire, SPI, QSPI, Microwire) | ||
| Output Type | Voltage | ||
| Voltage Reference | Internal, External | ||
| Operating Temperature Range | -40°C to 105°C | ||
| Power Dissipation | 450 | mW | |
| Power-Down Current | 80 nA (typical) | Both DACs powered down |
Key Features
- Low power operation: Consumes typically 15 mW at 5.5 V, making it ideal for battery-powered applications.
- Rail-to-rail output: The on-chip output buffer amplifiers allow the outputs of the DACs to swing rail to rail with a settling time of typically 1.2 μs.
- Internal or external reference capability: The AD7303BRM can use either an internal or external reference voltage.
- High-speed serial interface: Compatible with SPI, QSPI, and Microwire standards with clock rates up to 30 MHz.
- Individual power-down of each DAC: Each DAC can be powered down independently, reducing current consumption to typically 80 nA when both are powered down.
Applications
- Portable battery-powered instruments: Ideal for devices that require low power consumption and high accuracy.
- Digital gain and offset adjustment: Useful in applications where precise voltage adjustments are necessary.
- Programmable voltage and current sources: Can be used to generate precise voltage or current levels.
- Programmable attenuators: Suitable for applications requiring adjustable signal attenuation.
- Industrial control systems, medical devices, and automotive electronics: Due to its high-resolution analog outputs and robust operating temperature range.
Q & A
- Q: What is the resolution of the AD7303BRM?
A: The AD7303BRM has an 8-bit resolution.
- Q: What is the operating voltage range of the AD7303BRM?
A: The AD7303BRM operates from a single supply voltage ranging from +2.7 V to +5.5 V.
- Q: What types of serial interfaces does the AD7303BRM support?
A: The AD7303BRM supports SPI, QSPI, and Microwire serial interfaces.
- Q: Can the AD7303BRM use both internal and external reference voltages?
A: Yes, the AD7303BRM can use either an internal or external reference voltage.
- Q: What is the maximum settling time of the AD7303BRM?
A: The maximum settling time of the AD7303BRM is typically 2 μs.
- Q: How much current does the AD7303BRM consume when both DACs are powered down?
A: When both DACs are powered down, the AD7303BRM consumes typically 80 nA.
- Q: What is the operating temperature range of the AD7303BRM?
A: The operating temperature range of the AD7303BRM is -40°C to 105°C.
- Q: What package types are available for the AD7303BRM?
A: The AD7303BRM is available in MSOP-8 package.
- Q: What are some typical applications of the AD7303BRM?
A: Typical applications include portable battery-powered instruments, digital gain and offset adjustment, programmable voltage and current sources, and programmable attenuators.
- Q: Is the AD7303BRM RoHS compliant?
A: Yes, the AD7303BRM is RoHS compliant.
